Diagnosis. Similar to Begonia gemella differing from that species by the very sparse indumentum of red emergences on vegetative parts, ovate to elliptic lamina with serrate margin, and longer female flower pedicel 1.6–4 cm long (glabrous vegetative parts, suborbicular lamina with sublobed margin and female flower pedicels 7 mm long in B. gemella)

I.M. Ardhaka, W.H. Ardi, N.K.E. Undaharta and I.G. Tirta. 2016. A New Species Begonia from Manusela National Park, Seram.